Analysis of the composite structures in diamond thin films by Raman spectroscopy

R. E. Shroder, Robert Nemanich, J. T. Glass

Research output: Contribution to journalArticle

492 Citations (Scopus)

Abstract

Diamond and diamondlike thin films produced by various chemical-vapor- deposition processes have been examined using Raman spectroscopy. These films exhibit features in the Raman spectra, suggesting that they are composites of crystalline and amorphous diamond and graphitic structures. The components of this composite structure that contribute to the Raman scattering are discussed in terms of sp2- and sp3-bonded structures. The use of Raman spectroscopy as a technique for estimating the sp2-to-sp3 bonding ratio is considered. Powder composites of BN-diamond and graphite-diamond have been studied as a means of modeling the films, and a simple theoretical model of the Raman scattering from these samples is proposed. From these results it is shown that it is necessary to make assumptions about the domain size of the graphitic sp2 regions. It is found that the Raman scattering associated with sp2 bonding in the films is much stronger than that from single-crystalline or microcrystalline graphite structures. Shifts of the vibrational modes are also observed. The optical and vibrational properties of the sp2 component in the films implies a different atomic microstructure. A model of the sp2-bonding configurations in the films is proposed which may account for the observed features in the Raman spectra.

Original languageEnglish (US)
Pages (from-to)3738-3745
Number of pages8
JournalPhysical Review B
Volume41
Issue number6
DOIs
StatePublished - 1990
Externally publishedYes

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Diamond films
composite structures
Composite structures
Diamond
Raman spectroscopy
Raman scattering
diamonds
Raman spectra
Diamonds
Thin films
thin films
Graphite
graphite
Crystalline materials
composite materials
Composite materials
Powders
Chemical vapor deposition
vibration mode
estimating

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Analysis of the composite structures in diamond thin films by Raman spectroscopy. / Shroder, R. E.; Nemanich, Robert; Glass, J. T.

In: Physical Review B, Vol. 41, No. 6, 1990, p. 3738-3745.

Research output: Contribution to journalArticle

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